Victron Energy Filax-2 Ultra-Fast AC Transfer Switch 230V – SDFI0000000

Product Overview

The Victron Energy Filax-2 SDFI0000000 is an ultra-fast automatic AC transfer switch designed to maintain an uninterrupted power supply to sensitive and critical electrical equipment. Rated at 16A, it automatically switches between two independent AC power sources, ensuring connected equipment continues receiving power when the primary supply fails or moves outside its acceptable voltage or frequency range.

Designed for off-grid, backup power and marine electrical installations, the Filax-2 is particularly suitable for computers, communication equipment, industrial controls and modern electronic devices that require a reliable AC supply.

This model is the 230V/50Hz–240V/60Hz version, making it suitable for UK and European 230V electrical systems.

Ultra-Fast Automatic Switching

The Filax-2 normally supplies connected equipment from the priority AC source, which is typically mains electricity, shore power or a generator. An alternative source, usually an inverter or inverter/charger, is connected as a backup.

If the priority supply fails or its voltage or frequency moves outside the configured operating limits, the Filax-2 automatically transfers the load to the alternative source. The maximum transfer time is just 16 milliseconds, helping sensitive equipment continue operating without disruption.

When the priority supply returns and remains within its acceptable operating limits for 30 seconds, the Filax-2 automatically switches the load back to the priority source.

Designed for Sensitive Electrical Equipment

Unlike conventional transfer switches intended for general electrical loads, the Filax-2 has been specifically developed for equipment that benefits from extremely fast source switching.

Typical applications include computers, network equipment, communication systems, electronic control equipment and other sensitive electrical devices.

It is particularly useful in backup power installations where an inverter provides an alternative supply during a mains or generator failure.

The Filax-2 is not designed for high-power appliances or equipment with substantial starting-current surges, such as washing machines and electric motors. For installations requiring a more general-purpose AC transfer switch, Victron Quattro inverter/chargers or the VE Transfer Switch range may be more appropriate.

Automatic Source Monitoring

The Filax-2 continuously monitors the priority source for voltage and frequency conditions. If the supply falls outside its switching thresholds, it automatically transfers the connected load to the alternate source.

The unit uses open-transition switching, also known as break-before-make operation, preventing the two AC sources from being connected together during changeover.

A frequency selection jumper allows configuration for either 50Hz or 60Hz operation. For UK installations, the 50Hz configuration is normally used.

LED indicators provide a clear indication of which source is supplying the connected load and whether a priority-source fault has been detected.

Technical Specifications

The Victron Energy Filax-2 SDFI0000000 is designed for 230V AC at 50Hz and 240V AC at 60Hz. It has a maximum continuous current rating of 16A and a maximum load transfer time of 16 milliseconds.

The priority-source low-voltage switching threshold is 180V AC, with reverse switching at 188V AC. The low-frequency switching threshold is 45Hz at 50Hz operation, with reverse switching at 47Hz. The maximum continuous input voltage for both the priority and alternate sources is 260V AC.

The automatic return delay is 30 seconds once the priority supply has stabilised within the required operating limits.

The operating temperature range is -20°C to +50°C, with maximum non-condensing humidity of 95%.

The enclosure is manufactured from ABS plastic, finished in light grey (RAL7035), and has an IP65 ingress protection rating. Dimensions are approximately 120mm high, 255mm wide and 75mm deep. The unit weighs approximately 0.8kg.

Installation and Compatibility

The Filax-2 has dedicated connections for the priority AC input, alternate AC input and switched output. Each connection includes live, neutral and protective earth terminals.

Both AC inputs must be appropriately protected against currents exceeding 16A, and suitable external residual-current protection must be incorporated into the installation. Correct wiring, source configuration and frequency selection are essential for reliable operation.

The unit should be installed in a dry, well-ventilated location by a suitably qualified electrical installer. It is compatible with appropriately configured 230V AC mains, generator and inverter-based systems.

Product Summary

The Victron Energy Filax-2 is a compact, high-speed automatic AC transfer switch designed to protect the continuity of power to sensitive electrical equipment. With its 16A rating, automatic source monitoring, transfer time of just 16 milliseconds and IP65 enclosure, it provides a dependable solution for professional backup power, off-grid and marine installations.